Technically, Pluto is now included in the group known as 'Dwarf Planets' - rocky bodies large enough to maintain a stable shape and orbiting the sun (rather than being a satellite of another orbital body) but which haven't cleared their orbital path of other objects - others in the group include Ceres in the inner Solar System and Eris, Makemake and Haumea outside of the Neptunian orbital path. I think the complete list of dwarf planets runs to a couple of hundred, now.
O.